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lvmcache: new function to check if VG is foreign

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When not using lvmetad, this uses the system_id field in
the cached vginfo structs that are populated during a scan.

When using lvmetad, this requests the VG from lvmetad, and
checks the system_id field in the returned metadata.
This commit is contained in:
David Teigland 2015-11-30 11:54:56 -06:00
parent 05ac836798
commit eb22f7c8f7
4 changed files with 44 additions and 0 deletions
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14
lib/cache/lvmcache.c vendored
View File

@ -2402,3 +2402,17 @@ void lvmcache_get_max_name_lengths(struct cmd_context *cmd,
} }
} }
int lvmcache_vg_is_foreign(struct cmd_context *cmd, const char *vgname, const char *vgid)
{
struct lvmcache_vginfo *vginfo;
int ret = 0;
if (lvmetad_active())
return lvmetad_vg_is_foreign(cmd, vgname, vgid);
if ((vginfo = lvmcache_vginfo_from_vgid(vgid)))
ret = !is_system_id_allowed(cmd, vginfo->system_id);
return ret;
}

1
lib/cache/lvmcache.h vendored
View File

@ -194,5 +194,6 @@ int lvmcache_contains_lock_type_sanlock(struct cmd_context *cmd);
void lvmcache_get_max_name_lengths(struct cmd_context *cmd, void lvmcache_get_max_name_lengths(struct cmd_context *cmd,
unsigned *pv_max_name_len, unsigned *vg_max_name_len); unsigned *pv_max_name_len, unsigned *vg_max_name_len);
int lvmcache_vg_is_foreign(struct cmd_context *cmd, const char *vgname, const char *vgid);
#endif #endif

26
lib/cache/lvmetad.c vendored
View File

@ -1808,3 +1808,29 @@ void lvmetad_validate_global_cache(struct cmd_context *cmd, int force)
_update_changed_pvs_in_udev(cmd, &pvc_before, &pvc_after); _update_changed_pvs_in_udev(cmd, &pvc_before, &pvc_after);
} }
} }
int lvmetad_vg_is_foreign(struct cmd_context *cmd, const char *vgname, const char *vgid)
{
daemon_reply reply;
struct dm_config_node *top;
const char *system_id = NULL;
char uuid[64];
int ret;
if (!id_write_format((const struct id*)vgid, uuid, sizeof(uuid)))
return_0;
reply = _lvmetad_send("vg_lookup",
"uuid = %s", uuid,
"name = %s", vgname,
NULL);
if ((top = dm_config_find_node(reply.cft->root, "metadata")))
system_id = dm_config_find_str(top, "metadata/system_id", NULL);
ret = !is_system_id_allowed(cmd, system_id);
daemon_reply_destroy(reply);
return ret;
}

3
lib/cache/lvmetad.h vendored
View File

@ -169,6 +169,8 @@ int lvmetad_pvscan_foreign_vgs(struct cmd_context *cmd, activation_handler handl
int lvmetad_vg_clear_outdated_pvs(struct volume_group *vg); int lvmetad_vg_clear_outdated_pvs(struct volume_group *vg);
void lvmetad_validate_global_cache(struct cmd_context *cmd, int force); void lvmetad_validate_global_cache(struct cmd_context *cmd, int force);
int lvmetad_vg_is_foreign(struct cmd_context *cmd, const char *vgname, const char *vgid);
# else /* LVMETAD_SUPPORT */ # else /* LVMETAD_SUPPORT */
# define lvmetad_init(cmd) do { } while (0) # define lvmetad_init(cmd) do { } while (0)
@ -197,6 +199,7 @@ void lvmetad_validate_global_cache(struct cmd_context *cmd, int force);
# define lvmetad_pvscan_foreign_vgs(cmd, handler) (0) # define lvmetad_pvscan_foreign_vgs(cmd, handler) (0)
# define lvmetad_vg_clear_outdated_pvs(vg) (1) # define lvmetad_vg_clear_outdated_pvs(vg) (1)
# define lvmetad_validate_global_cache(cmd, force) do { } while (0) # define lvmetad_validate_global_cache(cmd, force) do { } while (0)
# define lvmetad_vg_is_foreign(cmd, vgname, vgid) (0)
# endif /* LVMETAD_SUPPORT */ # endif /* LVMETAD_SUPPORT */